Improvement in mechanical movements



W. COX.-

' Mechanical Movements.

N0 148 55] Patented March17.1874.

I E JTIGJ mine-med Z a (5M Z L? '7 I "a" MJQW/ WVILLIAM COX, OFPHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO HIMSELF AND DANIEL KNIFE, OFSAME PLACE.

IMPRQVEMENT it! MECHANICAL MOVEMENTS.

Specification forming part of Letters Patent No. H4l,55 H, dated March17, 1874; application filed August 1'3, 1873.

To all whom it may concern:

Be it known that I, IVILLIAM Cox, of Philadelphia, State ofPennsylvania, have invented a new Mechanical Movement, of which thefollowing is a specification:

The object of my invention is a mechanical movement which can be appliedto the polishing of leather and other useful purposes; the said movementconsisting of the combination of a reciprocating slide, A, .a lever, B,which is hung to the slide, and through which the latter receives itsmovement, and an arm, I), connected to the slide, bearin g against thesame, and carrying at its lower end the tool for operating on theleather or other material, all substantially as shown in Figures 1 and 2of the accompanying drawing.

In the present instance, I have illustrated my invention as applied to aleather-polishing machine, E being the usual yielding top of a table onwhich the leather is placed. 1 guides F, above and parallel with theface of the table, and forming part of any suitable frame, is adapted aslide, A, to which is hung the above-mentioned lever B, having threearms, a, Z), and c, to the first of which is connected one end of a rod,II, the opposite end receiving the pin of a crank-wheel, I, on adrivingshai't, J. To the arm B of the lever B is jointed the upper endof the arm I), which, in the present instance, carries at its lower endthe agate 7:, usually employed in polishing leather, the said armhearing against a projection, m, on the slide A, to which it is looselyconfined by a strap, a, the latter in no way interfering with the freesliding and vibratory movement of the said arm I). Presumin g the cank-wheel I to be moving in the direction of the arrow, the forceexerted through the lever B to move the slide A in the direction of itsarrow will also be exerted, through the same lever, to depress the arm1), and force its polishing-agate against the leather on the table E forit should be understood that, in this case, there is nothing to resistthe force exerted to depress the arm D, excepting the leather and thetable on which it is placed, while the tendency of the arm D to move inthe direction of the arrow 2 will be resisted by the projection m of theslide A. Before the slide commences to return, the first rearwardmovement of the connecting-rod II will be exerted to move the le ver Buntil its arm 0 is in contact with the slide; and, by this movement ofthe lever, the arm I) will be elevated, as shown in Fig. 2, and willretain its elevated position as the slide returns, and until the forwardmovement of the rod II commences, which movement will first depress thearm, and force its polisher against the leather before the sliderecommences its forward movement. This movement of the polisher isprecisely what is required to impart to the leather the desired finish.During the forward movement of the slide, the arm I) of the lever is notin contact with it, the pressure of the agate on the leather beingunrestricted. This is desirable for leather-polishing purposes, but thedevice maybe applied to other uses which demand a limit to the downwardmovement of the arm. In grooving or planing stone or marble, or othermaterial, for instance, where the tool at the end of the arm I) must cutto a definite depth, the arm I) of the lever B should he in contact withthe slide during the forward movement of the same; or the arm may befurnished with a setscrew, y, as shown in Fig. 3, by the adjustment ofwhich the extent of the depression of the arm 1), and, consequently, thedepth of the out of-the tool, may be regulated at pleasure. It is notessential that the lever B should have the third arm 0, as the vibrationof the lever, which may be of the bellerank form, (shown in Fig. 3,) maybe limited by a projection, t, on the slide, as seen in that figure. V

I claim as my invention, and as a new mechanical movement- Thecombination of reciprocating slide A, lever B, hung to the slide, andserving as the medium through which the slide is operated, and the armI), also hung to the lever, and re stricted as regards its vibratingmovement by a projection, m on the slide, all substantially as setforth. I

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

WILLIAM 60X.

lVitnesses I. I. BUonnY, J. Srmnnonnn SINGER.

